#4586: Clear Results feature in Notebooks (#4705)

* #4586: Clear all outputs feature

* text change

* Adding extensible method with integration tests

* Misc change

* Misc change

* Adding more logging

* Change to test

* Adding outputs confition in integration tests

src/sql/azdata.proposed.d.ts

@@ -4024,6 +4024,12 @@ declare module 'azdata' {
 			 * @return A promise that resolves with a value indicating if the cell was run or not.
 			 */
 			runCell(cell?: NotebookCell): Thenable<boolean>;
+
+			/**
+			* Clears the outputs of all code cells in a Notebook
+			* @return A promise that resolves with a value indicating if the outputs are cleared or not.
+			*/
+			clearAllOutputs(): Thenable<boolean>;
 		}
 
 		export interface NotebookCell {